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Date: Fri, 2 Jan 2015 22:46:34 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: dev@ambari.apache.org
Message-ID: <JIRA.12764430.1420062589000.1424.1420238794410@Atlassian.JIRA>
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References: <JIRA.12764430.1420062589000@Atlassian.JIRA>
 <JIRA.12764430.1420062589118@arcas>
Subject: [jira] [Commented] (AMBARI-8970) Custom Actions for Namenode to
 execute tasks by calling a python script
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    [ https://issues.apache.org/jira/browse/AMBARI-8970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14263296#comment-14263296 ] 

Hadoop QA commented on AMBARI-8970:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12689882/AMBARI-8970.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 2 new or modified test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of javac compiler warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number of release audit warnings.

    {color:red}-1 core tests{color}.  The patch failed these unit tests in ambari-server:

                  org.apache.ambari.server.controller.internal.HostStackVersionResourceProviderTest
                  org.apache.ambari.server.controller.internal.ClusterStackVersionResourceProviderTest
                  org.apache.ambari.server.controller.AmbariManagementControllerTest

Test results: https://builds.apache.org/job/Ambari-trunk-test-patch/1148//testReport/
Console output: https://builds.apache.org/job/Ambari-trunk-test-patch/1148//console

This message is automatically generated.

> Custom Actions for Namenode to execute tasks by calling a python script
> -----------------------------------------------------------------------
>
>                 Key: AMBARI-8970
>                 URL: https://issues.apache.org/jira/browse/AMBARI-8970
>             Project: Ambari
>          Issue Type: Technical task
>          Components: ambari-server
>    Affects Versions: 2.0.0
>            Reporter: Alejandro Fernandez
>            Assignee: Alejandro Fernandez
>             Fix For: 2.0.0
>
>         Attachments: AMBARI-8970.patch
>
>
> Currently, the upgrade-2.2.xml file, which contains the Upgrade Pack, defines the exact commands to run for the Namenode prepare and finalize steps.
> The downside of having this logic in the xml file is that it makes it difficult to maintain, and is not as powerful as being able to run the commands by using Python and its functions. Therefore, it is preferable for the ExecuteTask to be able to invoke a function inside a script.
> The plan is for Namenode to have functions for prepare and finalize, and for the upgrade pack to contain something like,
> Masters Group,
> {code}
>     <service name="HDFS">
>       <component name="NAMENODE">
>         <pre-upgrade>
>           <task xsi:type="execute" hosts="master">
>             <script>scripts/namenode.py</script>
>             <function>prepare_rolling_upgrade</function>
>           </task>
>         </pre-upgrade>
>      </component>
>    </service>
> {code}
> While the Cluster Group has,
> {code}
>       <execute-stage service="HDFS" component="NAMENODE" title="Execute HDFS Finalize">
>         <task xsi:type="execute" hosts="master">
>           <script>scripts/namenode.py</script>
>           <function>finalize_rolling_upgrade</function>
>         </task>
>       </execute-stage>
> {code}


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